[TDW]

I have removed lots of pipe plugs from old steam and hot water heating systems. Using a small propane torch, heat the plug up. Concentrate the heat on the plug. When it is fairly warm, melt some bees wax around the threads. The wax will flow into the threads pretty good. Let it set for a few minuets.Turn the plug both ways a small amount until you feel it break loose. It should come out this way. You can use a wax seal for a water closet [toilet] to melt into the threads.